I have that "Disco Madness" comp, I don't remember the Latin Rascals version having any issues with sound, but I haven't listened to it in years...

No, I haven't gotten the updates, they're only available if you order the discs through Liebrand's own site, right? I did that a couple of times, but the delivery prices were a bit ridiculous, cos the only delivery option he offered was DHL, you couldn't choose regular mail.

There's a way to subscribe to all the updates if you bought them elsewhere - it's a bit wacky, I think you send a photo of a complete set and pay €20. Something like that. But you can get the ones for the volumes you but direct anyway.

Notable on this one is there's supposedly a full version of Disco Circus (the one on the CD is partly from a vinyl copy and quite noticeable.)